Version v2.57 (May 2021)

Put calculation of fline back in.

Avoid floating point errors in amcrs, ee1expo, huntf

Added new quantity to printout in pprint(9)

Repaired length incompatibilities and variable type conflicts in arguments to cfitsion routines.

This version marks the introduction of extensive new atomic data for trace elements: odd-Z elements with $Z \leq 19$ and all elements with $Z \geq 21$ except for Fe and Ni. For more details see [Kallman et al.(2021)].